I would like to make quite sure about this implicit GROUP BY "feature",
since it seems really important yet does not seem to be mentioned in the CQL reference documentation. Aaron, you said "yes" -- is that "yes, always, in all scenarios no matter what" or "yes usually"? Is it something we can bet the farm and farmer's family on? The kinds of scenarios where I am wondering if it's possible for partition-key groups to get intermingled are : . what if the node containing primary copy of a row is down and cassandra fetches this row from a replica on a different node (e.g. with CONSISTENCY ONE) . what if there is a heavy stream of UPDATE activity from applications which connect to all nodes, causing different nodes to have different versions of replicas of same row? Can you point me to some place in the cassandra source code where this grouping is ensured? Many thanks, John Lumby
